Combined spring and spike tooth harrow.



J. R. NAYLOR. COMBINED SPRING AND SPIKE TOOTH HAREOW. APPLICATION IILBDAPR. 26, 1907.

'901,118.- Patented Oct. 13,1908.

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, UNITED STATES PATENT OFFICE.

COMBINED SPRING AND SPIKE TOOTH HARROW.

No. 901,118. Specification of Application filed April 26,

To all whom it may concern;

Be it known that I, J ONATHAN R. NAYLOR,

a citizen of the United States, and a resident of La Grange, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in a Combined Spring and Spike Tooth Harrow; and Ido hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of referencemarked thereon, which form a part of thisspecification.

This invention relates to improvements in combined spring and spiketooth harrows and the invention consists in the matters hereinafter setforth and more particularly pointed out in the appended claims.

Among the objects of my invention is to provide a harrow of the typementioned which is so constructed and arranged that it may be adjustedto bring into action upon the soil both sets of teeth at varying depthsof penetration or may be adjusted so as to bring into action either setof said teeth.

In the drawings :Figure 1 is a vertical longitudinal section of a harrowmade in accordance with my invention taken on line 11 of Fig. 2. Fig. 2is a partial top plan view thereof. Fig. 3 is a detail section, taken online 3-3 of Fig. 2. Fig. 4 is a detail section, taken on line 44 of Fig.2. Fig. 5 is a section, taken on line 55 of Fig. 1.

As shown in the drawings, the frame of the harrow comprises a front bar10, side bars 11 rigidly secured together, and a rear bar 12. In Fig. 2is shown but a single section of a barrow, but it will be understoodthat two or more sections may be secured together by a single draft-bar13 in a familiar manner.

14 and 15 designate cross-bars extending transversely between the sidemembers of the frame. As herein shown, the said bars are arranged inpairs. As herein shown, three pairs of such bars are employed. The bars14 carry spring teeth 16 while the bars 15 carry spike teeth 17 The rearbar of the harrow is a spike tooth bearing bar, it being desirable thatthe finishing work of the harrow shall be accomplished by the spiketeeth 17.

The spring and spike tooth bearing bars 14 and 15 are rotatively mountedin brackets 18 attached to and depending from the side Letters Patent.

1907. Serial No. 370,486.

Patented Oct. 13, 1908.

frame members 11, each of said brackets being rigidly fixed to its sideframe by bolts (Fig. 5) and provided with two openings in which the bars14 and 15 are mounted in a manner to have a rocking movement therein.The rear bar 12 is also rockingly mounted at its ends in brackets 19attached to and depending from the side frame members.

i 20 and 21 designate connecting bars or links which extend transverselyacross the spring and spike tooth bars from front to rear of the harrowsection. The bar 20 is loosely connected with the upper ends of arms 22,22 which are fixed non-rotatively to the spike tooth bearing bars andextend upwardly therefrom. The connection of the upper ends of said arms22 with the connecting bar 20 comprises pins 23 extending through thesaid bar and arms and fixed in place by cotter-pins, as shown in Fig. 1.The sprin tooth bearing bars 15 are likewise provided withnon-rotatively connected, upwardly extending arms 24 which are, in alike manner, loosely connected at their upper ends with the connectingbar 21.

25 designates a forwardly and rearwardly swinging adjusting lever forthe spike tooth bearing bars 15. Said lever 25 is non-rotatively fixedat its lower end to the rearmost nected between its ends by means of apin 26 with the connecting bar 20.

27 designates a notched segment fixed to the connecting bar 20 at oneside of the adjusting lever 25, and said adjusting lever is providedwith a movable pawl or detent 28 which engages the notches or teeth ofsaid segment to hold the lever 25 and the spike teeth adjusted therebyin any adjusted position desired. 7

3O designates a forwardly and rearwardly swinging adjusting lever forthe spring teeth bearing bars 14 which is hinged at its lower end to therearmost spike tooth bar 12 be tween collars 31, 31 fixed thereon. Thesaid lever 30 is connected with the connecting bar 21 for the springtooth bearing bars by means of a pin 32, as best shown in Figs. 3 and 4.

33 designates a notched segment that is fixed to the connecting bar 21at the side of the lever 30, and the lever 30 is provided with a movabledetent 34 adapted to engage the teeth or notches of said notched segmentto hold the bar 30 and the spring teeth in any adjusted positiondesired.

spike tooth bearing bar 12 and is loosely con- It will be observed thatthe adjusting levers and operate independently of each other, wherebyeither lever may set to adjust the of teeth with which it is connectedwithout changing the adjustment of the other set of teeth. For instance,if the lever 25 be thrown baekwardly from the position shown in Fig. 1,the spike teeth will be set to penetrate the soil more deeply than inthe position shown in said Fig. 1. On the other hand, it the said lever25 be swung torwardly the said spike teeth will be set at greaterinclination to the soil and thus penetrate the soil to a less depth. Byswinging the lever 30 rearwardly from the position shown, the springteeth may be swung down in position to penetrate the soil and itwill beobserved that such adjustment of the spring teeth to the soil will beetl'ected without in any manner affecting the action of the spike teethon the soil. Furthermore, it will be observed that the spring teeth, byproper manipulation of the adjusting lever 80, ma be adjusted topenetrate deeply into the soil while the spike teeth may be thrownentirely out of the soil. Thus I am enabled by the mechanism describedto operate the harrow either as a spring or spike tooth harrow and toadjust either set of teeth to various depths, or I may operate theharrow as a combined spring and spike tooth harrow and at the same timeam able to vary the depth of penetration of one or both sets of teeth,

- the adjustment of one set of teeth being independent of the adjustmentof the other teeth.

I claim as my invention 1. A harrow comprising a frame, a plurality ofrocking bars extending across the tl rame and mounted in bearings;carried by 1 bars for adjilsting the spring teeth to the soil, saidadjusting means permitting the two sets ol teeth to be adjusted forsimultaneous or independent use. and to penetrate the soil at varyingdepths, either when used singly or combined.

2. A harrow comprising a lrame, a plurality of parallel closely spacedrocking bar mounted in bearings carried by the side members ol said'lrame, said bars being ar ranged in sets, one set bearing spring teethand the other set bearing spike teeth, the bars of each set beingarranged alternately to the bars of the other set, adjusting meansconnected with all oi the bars ol one set t'or rocking them in unison,and separate adjusting means likewise connected with all ot' the bars ofthe other set, whereby the two sets 01 teeth may be adjusted forsimultaneous or independent use, and to penetrate the soil either when.used singly or together at '\'ar ing depths.

In testimony, that l claim the 'loregoing my invention l allix mysignature in the presence (Iii two witnesses, this 20th day ol- April A.D. 1907.

JONiUllll itN ll. NA Ylitlll. Witnesses VLLLTAM L. Hum, Gi-ionon R.YILKINS.

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